冷媒R-134a與潤滑油在小管內之熱傳及壓降實驗分析

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研究生：	陳金賢 Jing-Xian Chen
論文名稱：	冷媒R-134a與潤滑油在小管內之熱傳及壓降實驗分析
指導教授：	楊建裕 Chien-Yuh Yang
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 機械工程學系 Department of Mechanical Engineering
畢業學年度：	88
語文別：	中文
論文頁數：	139
中文關鍵詞：	冷媒含油熱傳、冷媒含油壓降、熱傳、壓降
相關次數：	點閱：8 下載：0
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在純冷媒的壓降實驗結果，其較為接近Yang & Webb（1996）的實驗結果，平均偏差約為 20.09﹪。在凝結熱傳方面實驗結果以Shah（1979）的熱傳關係式最為接近，其平均偏差約為 14.62 ﹪。在蒸發熱傳方面實驗結果，其熱傳係數平均而言皆比所有熱傳關係式大，而其中以Gungor-Winterton（1986）的關係式較為接近本實驗值，其平均偏差約為 30.84 ﹪。
就含油後之實驗結果，在凝結熱傳方面，整體而言，含油後的熱傳係數並無明顯的影響。而在蒸發熱傳方面，在較高乾度低含油量時，其熱傳係數明顯會增加。

目 錄
頁次
摘要--------------------------------------------------------------------------------------i
目錄--------------------------------------------------------------------------------------ii
表目錄-----------------------------------------------------------------------------------v
圖目錄-----------------------------------------------------------------------------------vi
符號說明--------------------------------------------------------------------------------xii
第一章 前言---------------------------------------------------------------------------1
1 研究背景--------------------------------------------------------------------------1
2 研究目的--------------------------------------------------------------------------2
第二章 文獻回顧---------------------------------------------------------------------4
1 管內壓降--------------------------------------------------------------------------4
2 管內熱傳--------------------------------------------------------------------------8
2.1 蒸發熱傳------------------------------------------------------------------ 8
2.2 凝結熱傳------------------------------------------------------------------ 13
第三章 實驗方法---------------------------------------------------------------------25
1 簡介--------------------------------------------------------------------------------25
2 實驗系統構造--------------------------------------------------------------------26
2.1 測試段---------------------------------------------------------------------26
2.2 冷媒循環系統------------------------------------------------------------26
2.3 水循環系統--------------------------------------------------------------27
3 實驗量測設備--------------------------------------------------------------------27
3.1 溫度測量-----------------------------------------------------------------28
3.2 壓力量測-----------------------------------------------------------------28
3.3 壓差量測-----------------------------------------------------------------28
3.4 流量量測-----------------------------------------------------------------29
3.5 資料擷取系統-----------------------------------------------------------30
4 實驗過程--------------------------------------------------------------------------30
4.1 系統測漏-----------------------------------------------------------------30
4.2 系統填充冷媒-----------------------------------------------------------30
4.3 系統填充冷凍油--------------------------------------------------------31
4.4冷凍油濃度的量測------------------------------------------------------31
4.5 實驗步驟-----------------------------------------------------------------32
5 資料換算--------------------------------------------------------------------------33
5.1 熱傳資料換算-----------------------------------------------------------33
5.2 兩相壓降資料換算-----------------------------------------------------37
5.3 兩相摩擦倍數資料換算-----------------------------------------------39
6 Modified Wilson Plot Method-------------------------------------------------41
第四章 實驗結果與討論------------------------------------------------------------66
1 純冷媒之實驗結果--------------------------------------------------------------66
1.1 兩相摩擦壓降梯度------------------------------------------------------66
1.2 兩相摩擦倍數------------------------------------------------------------67
1.3 與Yang & Webb [1996]實驗結果之比較----------------------------69
1.4 與Friedel [1979]預測值之比較----------------------------------------70
2 純冷媒凝結熱傳------------------------------------------------------------------71
3 純冷媒蒸發熱傳------------------------------------------------------------------73
4 冷媒與冷凍油混合物的熱傳---------------------------------------------------75
4.1 冷媒-潤滑油混合物凝結熱傳----------------------------------------76
4.2 冷媒-潤滑油混合物蒸發熱傳----------------------------------------77
第五章 結論---------------------------------------------------------------------------129
參考文獻--------------------------------------------------------------------------------132
附錄--------------------------------------------------------------------------------------137

                                

參考文獻
參考文獻
參考文獻
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Eckels, S. J., and Pate, M. B., 1991, “In-Tube Evaporation and Condensation of Refrigerant-Lubricant Mixtures of HFC-134a and CFC-12,” ASHRAE Transactions, Vol. 97, Part 2, pp. 62-71.
Eckels, S. J., and Pate, M. B., 1991, “In-Tube Evaporation and Condensation of Refrigerant-Lubricant Mixtures of HFC-134a and CFC-12,” ASHRAE Transactions, Vol. 97, Part 2, pp. 62-71.
Eckels, S. J., and Pate, M. B., 1991, “In-Tube Evaporation and Condensation of Refrigerant-Lubricant Mixtures of HFC-134a and CFC-12,” ASHRAE Transactions, Vol. 97, Part 2, pp. 62-71.
Eckels, S. J., and Pate, M. B., 1991, “In-Tube Evaporation and Condensation of Refrigerant-Lubricant Mixtures of HFC-134a and CFC-12,” ASHRAE Transactions, Vol. 97, Part 2, pp. 62-71.
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廖啟仲、楊建裕, 1999, “冷媒R-134a在小管內之蒸發與凝結熱傳實驗分析比較,” 中國機械工程學會第16屆全國學術研討會論文集, 熱流與能源

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